import * as internal from "./internal/pool.js";
/**
* @since 2.0.0
* @category symbols
*/
export const PoolTypeId = internal.PoolTypeId;
/**
* Returns `true` if the specified value is a `Pool`, `false` otherwise.
*
* @since 2.0.0
* @category refinements
*/
export const isPool = internal.isPool;
/**
* Makes a new pool of the specified fixed size. The pool is returned in a
* `Scope`, which governs the lifetime of the pool. When the pool is shutdown
* because the `Scope` is closed, the individual items allocated by the pool
* will be released in some unspecified order.
*
* By setting the `concurrency` parameter, you can control the level of concurrent
* access per pool item. By default, the number of permits is set to `1`.
*
* `targetUtilization` determines when to create new pool items. It is a value
* between 0 and 1, where 1 means only create new pool items when all the existing
* items are fully utilized.
*
* A `targetUtilization` of 0.5 will create new pool items when the existing items are
* 50% utilized.
*
* @since 2.0.0
* @category constructors
*/
export const make = internal.make;
/**
* Makes a new pool with the specified minimum and maximum sizes and time to
* live before a pool whose excess items are not being used will be shrunk
* down to the minimum size. The pool is returned in a `Scope`, which governs
* the lifetime of the pool. When the pool is shutdown because the `Scope` is
* used, the individual items allocated by the pool will be released in some
* unspecified order.
*
* By setting the `concurrency` parameter, you can control the level of concurrent
* access per pool item. By default, the number of permits is set to `1`.
*
* `targetUtilization` determines when to create new pool items. It is a value
* between 0 and 1, where 1 means only create new pool items when all the existing
* items are fully utilized.
*
* A `targetUtilization` of 0.5 will create new pool items when the existing items are
* 50% utilized.
*
* The `timeToLiveStrategy` determines how items are invalidated. If set to
* "creation", then items are invalidated based on their creation time. If set
* to "usage", then items are invalidated based on pool usage.
*
* By default, the `timeToLiveStrategy` is set to "usage".
*
* ```ts skip-type-checking
* import { createConnection } from "mysql2";
* import { Duration, Effect, Pool } from "effect"
*
* const acquireDBConnection = Effect.acquireRelease(
* Effect.sync(() => createConnection('mysql://...')),
* (connection) => Effect.sync(() => connection.end(() => {})),
* )
*
* const connectionPool = Effect.flatMap(
* Pool.makeWithTTL({
* acquire: acquireDBConnection,
* min: 10,
* max: 20,
* timeToLive: Duration.seconds(60)
* }),
* (pool) => pool.get
* )
* ```
*
* @since 2.0.0
* @category constructors
*/
export const makeWithTTL = internal.makeWithTTL;
/**
* Retrieves an item from the pool in a scoped effect. Note that if
* acquisition fails, then the returned effect will fail for that same reason.
* Retrying a failed acquisition attempt will repeat the acquisition attempt.
*
* @since 2.0.0
* @category getters
*/
export const get = internal.get;
/**
* Invalidates the specified item. This will cause the pool to eventually
* reallocate the item, although this reallocation may occur lazily rather
* than eagerly.
*
* @since 2.0.0
* @category combinators
*/
export const invalidate = internal.invalidate;
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